Step 3 Open the ‘DMSS’ App -> ‘Door’, touch ‘+’ to add new device. Select ‘P2P’ connection way to connect with VTO2000A.

Step 4 touch ‘SN’ to scan QR code shown on the web interface, input ‘Username’ and ‘Password’ of VTO2000A. You must enable ‘push notification’, or the mobile phone can not receive the call from VTO. Then touch ‘Start to Preview’.